function nav2(num){
   for(var i=1;i<=7;i++){
      if(i==num){
	     document.getElementById("navMenuA_"+i).style.color="#000000";
	  }else{
	     //document.getElementById("navMenu_"+i).style.background="";
		 document.getElementById("navMenuA_"+i).style.color="#ffffff";
	  }
   }
   
   document.getElementById("second").innerHTML="";
   if(num==1){
     document.getElementById("second").className="second_home";
   }else{
     document.getElementById("second").className="second1";
	 document.getElementById("second").innerHTML=document.getElementById("nav_"+num).innerHTML;
   }
}